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Smithsonian National Museum of Natural History
GeoGallery
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GeoGallery
Cafarsite
Cobaltite
Conchita Montana Sapphire Butterfly
Corundum (var. sapphire)
Fluorite with quartz
Fluorites
Kyanite schist
Kyanite schist
Limestone with chert
Magnetite
Milarite with chlorite
Missouri River Sapphires
Montana Sapphires
Opal
Opal bone
Orthoclase (var. adularia)
Quartz (var. agate)
Quartz (var. agate)
Quartz (var. amethyst)
Quartz (var. smoky quartz)
Quartz Gems
Quinn Canyon
Rock Creek Sapphires
Roebling Opal
Sandstone
Siderite
Veszelyite
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